Try to fix CI build error.

`error:0308010C:digital envelope routines::unsupported`

nukebuild/Build.cs

@@ -119,6 +119,7 @@ partial class Build : NukeBuild
                 .SetProcessWorkingDirectory(webappDir)
                 .SetProcessArgumentConfigurator(a => a.Add("--silent")));
             NpmTasks.NpmRun(c => c
+                .SetProcessEnvironmentVariable("NODE_OPTIONS", "--openssl-legacy-provider")
                 .SetProcessWorkingDirectory(webappDir)
                 .SetCommand("dist"));
         });
@@ -321,4 +322,4 @@ public static class ToolSettingsExtensions
     {
         return configurator != null ? configurator(settings) : settings;
     }
-}
+}